#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
int main() {
    float n, cm;
    float sum;
    scanf("%f %f", &n, &cm);
    if (n >= 50 && n <= 180)
    {
        cm = cm / 100;
        sum = n / (cm * cm);
        printf("%.2f", sum);
        return 0;
    }
}